2018/11/15 by J. P. Marshall, J. Milli, É. Choquet +9
Physics and Astronomy · #Astro and Planetary Science #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Optics #Parallax #Photometry (optics) #Physics #Solar System #Stars #Stellar, planetary, and galactic studies #Wavelength #astro-ph.EP
paper · pdf · doi:10.3847/1538-4357/aaec6a
12 pages, 6 figures, 4 tables, accepted for publication in ApJ
arxiv created 2018/11/15 · openalex publication_date 2018/12/06 · arxiv updated 2018/12/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
HD 105 is a nearby, pre-main-sequence G0 star hosting a moderately bright debris disk ( L dust / L ⋆ ∼ 2.6 × 10 −4 ). The star and its surroundings might therefore be considered an analog of the young solar system. We refine the stellar parameters based on an improved Gaia parallax distance and identify it as a pre-main-sequence star with an age of 50 ± 16 Myr. The circumstellar disk was marginally resolved by Herschel /PACS imaging at far-infrared wavelengths. Here, we present an archival ALMA observation at 1.3 mm, revealing the extent and orientation of the disk. We also present Hubble Space Telescope ( HST )/NICMOS and VLT/SPHERE near-infrared images, where we recover the disk in scattered light at the ≥5 σ level. This was achieved by employing a novel annular averaging technique and is the first time this has been achieved for a disk in scattered light. Simultaneous modeling of the available photometry, disk architecture, and detection in scattered light allow better determination of the disk's architecture, and dust grain minimum size, composition, and albedo. We measure the dust albedo to lie between 0.19 and 0.06, the lower value being consistent with Edgeworth–Kuiper Belt objects.